Fastener for rotary elements.



O. S. LOUKWOOD."

PASTENER FOR ROTARY ELEMENTS. APPLICATION FILED JAN.13, 191s.

' 1 988 287. Patented Feb. 24, 1914.

, n I g w I v v WWVPAMU$$,W K9 M? are shown 'curing a sleeve, collar,hub or srn rns earner curios.

-QRIHG' ooiezenmr,

Loose/"con, es nswesxfusw JERSEY, ASSIGNOE TO HYATT ROLLER or HARRISON,new

JERSEY, A CORPORATION OF NEW' FASTENER FOR ROTARY ELEMENTS;

Patented Feb, lot 4,.

Application filed January 13, 1913. Serial No. 741,821.

h c who m iii-may cncem;'

l'le it known that l, Cimnnrs S. Loouwoon, a citizen oi the UnitedStates,residing at- 5289 Market street, Newark, county OfESSQK, andState ofllew Jersey, have invented cer tain new and useful Improvementsin Fasteners for Rotary Elements, fully described and represented in thefollowing specificl. tion and the accompanying drawings, forming a partof the same.

This invention relates to :1 nicans of seesimilar part detachably upon ashaft or other carrying iuen'iber without forn'iing any projection uponthe sleeve or collar, and without depending upon screw pressure toproduce a firm engagement of the parts. Keys and set-screws have beenemployed for securing such parts togetl'icr all depending for theiretllciency upon pressure and frictional en- 1 y iuent, and both areliable to accidental detachment or loosening, and are often constructc'd so as to form a projection upon the strait or hub, whichsometimes causes damage by accidental Contact or engagement withadjacent parts.

l the present invention, a fastener like a plu s extended into enga'enient with coincident bores or holes former radially through thesleeve and in the surface of the shaft, and the engagement of such pluglocks the parts together in the required manner, and .without anyprojection from the surface of the sleeve. The plug is fitted Inovablyin the said bores so that it may move longitudinally, andniay thus bewholly removed from the bores, or in ay be moved inwardly to thesurfaceof the shaft, so as not to interfere with the removal of thesleeve. The bore is extended entirely through the sleeve so that theouter end of the plug is readily accessible, and such outer end isprovided with means for rotating it and moving it inwardly in the actofdisengaging the sleeve from-the shaft. Plugs adapted respectively fordisengagement by thcsctwo movements Figure l is a cross section of ashaft with a collar and the fastener in section; Fig. 2 a section ofpart of the shaft and sleeve with the plug adjusted in position forreinoval. from the bore; Fig. 3 is a similar section wilhlhe plugremoved; Fig. l is a side view of the sleeve and sha f; with the plug inthe position shown iii-Fig. 2; Fig.6 is a of the plug in the annexedclawing, in

side view of the shaft showing the bore and recess therein; Fig. 6 is across section of a shaft with theplug threaded to a bore in the shaft.and shown in engagement with the sleeve; and Fig. 7 is a similar sectionof part of the shaft and sleeve with the plug discugagged from thesleeve.

In Figs. 1 to 5, the bore a in the sleeve A and the bore Z) in theshaftB are cylindrica and of the same size,-to receive a cylindrical fastenera of plug-shape which is movable freely in the said bores. The mouth ofthe bore is surrounded by an annular recess (2, upon the surface of theshafhand the bore a in the sleeve is formed at one side with alongitudinal releasing slot e extending from the outer side of thesleeve into connection with the said recess d which lies adjacent to theinner end of the slot. The inner side of the sleeve at another pointupon the bore a is formed with a notch f, and a locking-pin g is formedupon the fastener-plug in size suitable to pass readily through the slot0, as shown in Fig. 4;, and to engage the notch f, as shown in F ig, 1,and so located that when thus engaged with the notch, the head does notproject outside the surface of the sleeve. A spring It is inserted inthe bottom of the bore F) to press the plug normally outwardly,accidental disengagement of the pin when fitted in the notch f. lVhenthe pin is thus engaged, the plug is hold securely in on gagciuent withthe bores a and 7) and wholly prevents any longitudinal ,or rotarymovement oi tthe sleeve upon the shaft. A notch z is formed in the outerend of thcplug toinsort a screw-driver or turning-tool by which the plugcan be forcedinwardly to disengage the pin from the notch j, and thenrofated in the recess (Z until the pin in line with the slot 0, as shownin Figs. 2 and el.

The plug is then free to move outwardly under the pressure of thespring, and can be wholly removed from the two bores which releases thesleeve completely from the-shaft, as shown in Fig. 3. The annular recessd is for the purpose of permitting the pin to rotate from its lockedposition to the slot 0, and it is obviously immaterial whether suchannular recess be formed in the inner side of the sleeve or in the outerside of theshaft, and I havethereforc claimed the same as located at theinner end of the slot 0. It will be observed thatwit-h this constructionthe plug does not project beyond the surface of the sleeve when in itslocked position shown in Fig.1, and cannot project accidentally, as thespring it holds the pin securely in engagement with the notch f, whichprevents any outward movement of the plug or any rotary movement whichmight bring the pin in line with the releasing-slot e.

The device does not operate by screw or I wedge-pressure, like aset-screw or key, but the plug when in its operative position intersectsthejoint between the shaft and sleeve, and is held in such intersectingposition during its locked condition by such means that it cannot vmoveoutwardly beyond thesurface of the sleeve.

The same characteristic is possessed by the fastener shown in Figs; 6and 7, in which the bore 6' inthe shaft B is made larger than the bore ain the sleeve A. The plug has a threaded body-0 fitted to the bore 1),and a cylindrical shank c fitted movably to the bore in the sleeve. Thenotch i in the head'of such shank permits it to he'rot-ated, and thebore If is made of sufficient depth to permit the body a of theplugto-be screwed inwardly byrotating the plug, as shown in Fig. 7, sothat the-shank c is moved inwardly from the sleeve and leaves it free tobe r oved. from the shaft. In this construction, also it is impossiblefor the plug to accidentally move out ard and cause a projection uponthe exter or of the sleeve, collar, or hub, as the threaded portion .ofthe plug is made larger than the bore in the 35, sleeve, and preventsthe'shank c from moving outwardly after the threaded portion strikes theinner side'of the sleeve, as shown in Fig. 6, which revents any wardmovement w ile permitting a complete 40 eng)agement of the shank withthe bore a.

ne characteristic of both the plugs is,-.

that they require an inward longitudinal movement to be disengaged fromthe sleeve, which inward movement cannot occur accidentally; as with theconstruction shown in Fig. 1, such movement is prevented-b the spring72, and with the construction s own in Fig. 6 by the engagement of'th'ethread upon the fastener with the thread in the bore '6'. To disengagethe sleeve from the shaft, it is therefore necessary with eitherconstruction to move the plug inwardly,.

such inward movement in the one case permittingthe subsequent-withdrawalof the 55. fastener from both of the boresfwhile the inward movement inthe othercase permits the withdrawal of the fastener from the sleeveonly, leaving it buried in the bore upon the shaft.. The constructionthus wholly' avoids the possibility ofaccident from the projection of akey or sci .y upon the body of a shaft or collar.

further out- It will be observed that the plug used in this invention isdisposed radially to the shaft so as to intersect the joint of the shaftand collar, and is therefore movable transverse to the said joint whenfastening the collar upon or releasing it from the body of the shaft.

The invention is applicable to a shaft, collar, hub, wheel, or any partthat is to be fastened detachably upon a shaft or axle, and the termssleeve and collar 'have therefore been used interchangeably herein.

In all cases, the bore is extended wholly through the sleeve so that theouter end of the plug is accessible for rotating or ress-- ing 1tinwardly, and it will be notice that the plug performs all its functionswithout projecting beyond the outer surface of the sleeve where it wouldbe likely to catch in adjacent objects.

- Having thus set forth the nature of the invention what is claimedherein is:

1. In a device for securin a sleeve detachably upon a shaft, the comination, with a sleeve and shaft having a movable cylindrical joint withcoincident bores in such parts extended across the said joint to theouter side of the sleeve, of a fastener consisting of a plugfittedrotatably in the said bores and move e inwardly therein to clearthe sleeve from the shaft, and provided upon its outer end with meansaccessible at the outer surface of the sleeve for rotating it and movingit inwardly to clear the sleeve from the shafts i 2. In a device forsecuringa sleeve dctachably upon a shaft, the combination, with a sleeveand shaft having a movable cylindrical joint with coincident bo'res insuch parts extended across the said joint to the outer side of thesleeve, said sleeve having a longitudinal slot adjacent its bore andalso a locking-notch, and one of said parts having an annular recess atthe inner 'end of said slot, of a plug fitted rotatably in the saidbores and movable inwardly therein to clear the'sleeve from the shaft,and provided upon its outer end with means accessible at the outersurface of the sleeve, a spring to press it normally outward, and a inupon the plug adapted to engage the coking-notch and resist outwardmovement, and also adapted to rotate in the recess and moveoutwardlyfrom the slotto remove the plug from the sleeve.

' In testimony whereof I have hereunto set my hand in the presence oftwo subscribing witnesses.

CHARLES S. LOCKWOOD' \Vitnesses:

H. G. RANSOM, M. E. J AHN.

